org.apache.hadoop.hive.ql.udf.generic

Class GenericUDAFComputeBitVectorFMSketch.NumericStatsEvaluator<V,OI extends PrimitiveObjectInspector>

java.lang.Object

org.apache.hadoop.hive.ql.udf.generic.GenericUDAFEvaluator

org.apache.hadoop.hive.ql.udf.generic.GenericUDAFComputeBitVectorBase.NumericStatsEvaluatorBase

org.apache.hadoop.hive.ql.udf.generic.GenericUDAFComputeBitVectorFMSketch.NumericStatsEvaluator<V,OI>

All Implemented Interfaces:

Closeable, AutoCloseable

Direct Known Subclasses:

GenericUDAFComputeBitVectorFMSketch.GenericUDAFDateStatsEvaluator, GenericUDAFComputeBitVectorFMSketch.GenericUDAFDecimalStatsEvaluator, GenericUDAFComputeBitVectorFMSketch.GenericUDAFDoubleStatsEvaluator, GenericUDAFComputeBitVectorFMSketch.GenericUDAFLongStatsEvaluator, GenericUDAFComputeBitVectorFMSketch.GenericUDAFTimestampStatsEvaluator

Enclosing class:

GenericUDAFComputeBitVectorFMSketch

public abstract static class GenericUDAFComputeBitVectorFMSketch.NumericStatsEvaluator<V,OI extends PrimitiveObjectInspector>
extends GenericUDAFComputeBitVectorBase.NumericStatsEvaluatorBase

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.hadoop.hive.ql.udf.generic.GenericUDAFEvaluator

GenericUDAFEvaluator.AbstractAggregationBuffer, GenericUDAFEvaluator.AggregationBuffer, GenericUDAFEvaluator.AggregationType, GenericUDAFEvaluator.Mode

Field Summary

Fields

Modifier and Type	Field and Description
protected static int	MAX_BIT_VECTORS
protected PrimitiveObjectInspector	numVectorsOI

Fields inherited from class org.apache.hadoop.hive.ql.udf.generic.GenericUDAFComputeBitVectorBase.NumericStatsEvaluatorBase

inputOI, ndvFieldOI, partialResult, result

Fields inherited from class org.apache.hadoop.hive.ql.udf.generic.GenericUDAFEvaluator

partitionEvaluator

Constructor Summary

Constructors

Constructor and Description
NumericStatsEvaluator()

Method Summary

Modifier and Type	Method and Description
ObjectInspector	init(GenericUDAFEvaluator.Mode m, ObjectInspector[] parameters) Initialize the evaluator.
void	iterate(GenericUDAFEvaluator.AggregationBuffer agg, Object[] parameters) Iterate through original data.

Methods inherited from class org.apache.hadoop.hive.ql.udf.generic.GenericUDAFComputeBitVectorBase.NumericStatsEvaluatorBase

merge, reset, terminate, terminatePartial

Methods inherited from class org.apache.hadoop.hive.ql.udf.generic.GenericUDAFEvaluator

aggregate, close, configure, createPartitionEvaluator, estimate, evaluate, getExprString, getNewAggregationBuffer, getPartitionWindowingEvaluator, getWindowingEvaluator, isEstimable

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

MAX_BIT_VECTORS

protected static final int MAX_BIT_VECTORS

See Also:

Constant Field Values

numVectorsOI

protected transient PrimitiveObjectInspector numVectorsOI

Constructor Detail

NumericStatsEvaluator

public NumericStatsEvaluator()

Method Detail

init

public ObjectInspector init(GenericUDAFEvaluator.Mode m,
                            ObjectInspector[] parameters)
                     throws HiveException

Description copied from class: GenericUDAFEvaluator

Initialize the evaluator.

Overrides:

init in class GenericUDAFEvaluator

Parameters:

m - The mode of aggregation.

parameters - The ObjectInspector for the parameters: In PARTIAL1 and COMPLETE mode, the parameters are original data; In PARTIAL2 and FINAL mode, the parameters are just partial aggregations (in that case, the array will always have a single element).

Returns:

The ObjectInspector for the return value. In PARTIAL1 and PARTIAL2 mode, the ObjectInspector for the return value of terminatePartial() call; In FINAL and COMPLETE mode, the ObjectInspector for the return value of terminate() call. NOTE: We need ObjectInspector[] (in addition to the TypeInfo[] in GenericUDAFResolver) for 2 reasons: 1. ObjectInspector contains more information than TypeInfo; and GenericUDAFEvaluator.init at execution time. 2. We call GenericUDAFResolver.getEvaluator at compilation time,

Throws:

HiveException

iterate

public void iterate(GenericUDAFEvaluator.AggregationBuffer agg,
                    Object[] parameters)
             throws HiveException

Description copied from class: GenericUDAFEvaluator

Iterate through original data.

Specified by:

iterate in class GenericUDAFEvaluator

parameters - The objects of parameters.

Throws:

HiveException